Вычисли удобным способом.

Для удобства вычислений объединяем числа, дающие в сумме или произведении круглые числа (10, 20, 50, 100, 1000). **Первый столбик:** 774+52+26+48 = (774+26)+(52+48) = 800+100 = 900 112+506+94+88 = (112+88)+(506+94) = 200+600 = 800 75+237+325+163 = (75+325)+(237+163) = 400+400 = 800 304+212+108+96 = (304+96)+(212+108) = 400+320 = 720 528+93+172+107 = (528+172)+(93+107) = 700+200 = 900 34+146+266+54 = (34+266)+(146+54) = 300+200 = 500 148+330+170+52 = (148+52)+(330+170) = 200+500 = 700 43+54+65+76+27 = (43+27)+(54+76)+65 = 70+130+65 = 265 357+28+112+43 = (357+43)+(28+112) = 400+140 = 540 62+43+828+57 = (62+828)+(43+57) = 890+100 = 990 136+61+129+264 = (136+264)+(61+129) = 400+190 = 590 260+220+480 = (260+220+480) = 960 466+380+120+34 = (466+34)+(380+120) = 500+500 = 1000 154+218+326+2 = (154+218+326+2) = 700 427+16+373+184 = (427+373)+(16+184) = 800+200 = 1000 297+549+103 = (297+103)+549 = 400+549 = 949 616+298+84 = (616+84)+298 = 700+298 = 998 272-99-172 = (272-172)-99 = 100-99 = 1 705-217-305 = (705-305)-217 = 400-217 = 183 314+150+536 = (314+536)+150 = 850+150 = 1000 253+247+395 = (253+247)+395 = 500+395 = 895 576+49+124+31 = (576+124)+(49+31) = 700+80 = 780 355+165+145+15 = (355+145)+(165+15) = 500+180 = 680 425+412+75 = (425+75)+412 = 500+412 = 912 712-270-312 = (712-312)-270 = 400-270 = 130 89+211+617 = (89+211)+617 = 300+617 = 917 963-540-163 = (963-163)-540 = 800-540 = 260 216+215+254 = 685 771-205-131 = 435 687+23+113 = (687+113)+23 = 800+23 = 823 256+71+129+344 = (256+344)+(71+129) = 600+200 = 800 507-102-207 = 198 308+112+408+92 = (308+408)+(112+92) = 716+204 = 920 611-79-211-29 = (611-211)-(79+29) = 400-108 = 292 473+125+127+175 = (473+127)+(125+175) = 600+300 = 900 876-111-165 = 600 143+157+265+125 = (143+157)+(265+125) = 300+390 = 690 897-315-297 = (897-297)-315 = 600-315 = 285 324+239+176+61 = (324+176)+(239+61) = 500+300 = 800 **Второй столбик:** 4*7*25 = (4*25)*7 = 100*7 = 700 5*18*2 = (5*2)*18 = 10*18 = 180 25*2*4 = 25*(2*4) = 25*8 = 200 25*7*4*1 = (25*4)*7 = 100*7 = 700 8*9*5*2 = (8*2)*(9*5) = 16*45 = 720 5*7*4*5 = (5*4)*(7*5) = 20*35 = 700 7*2*6*5 = 7*(2*5)*6 = 7*10*6 = 420 3*4*25*3 = 3*(4*25)*3 = 3*100*3 = 900 9*5*3*4 = (9*3)*(5*4) = 27*20 = 540 7*5*7*2 = (7*2)*(5*7) = 14*35 = 490 11*10*2 = 11*(10*2) = 11*20 = 220 2*17*4*5 = 2*17*(4*5) = 34*20 = 680 5*29*2*2 = 5*2*29*2 = 10*58 = 580 6*4*5*3 = 6*3*(4*5) = 18*20 = 360 9*2*6*5 = 9*6*(2*5) = 54*10 = 540 2*7*5*5 = 2*5*(7*5) = 10*35 = 350 3*5*9*4 = (3*5)*(9*4) = 15*36 = 540 8*4*15*2 = (8*2)*(4*15) = 16*60 = 960 9*6*5*3 = 9*3*(6*5) = 27*30 = 810 25*7*4 = (25*4)*7 = 700 10*4*7*3 = 10*3*(4*7) = 30*28 = 840 20*8*5 = 20*(8*5) = 20*40 = 800 45*6*2 = 45*(6*2) = 45*12 = 540 6*3*50 = 6*(3*50) = 6*150 = 900 5*2*2*7*5 = (5*2)*(2*5)*7 = 10*10*7 = 700 8*4*5 = 8*(4*5) = 8*20 = 160 12*7*5 = 12*(7*5) = 12*35 = 420 4*4*50 = 4*(4*50) = 4*200 = 800 2*28*5 = (2*5)*28 = 10*28 = 280 6*7*15 = 6*(7*15) = 6*105 = 630 2*8*45 = 2*(8*45) = 2*360 = 720 4*3*5*2 = (4*5)*(3*2) = 20*6 = 120 9*25*3 = 9*75 = 675 10*4*11 = 440 4*16*10 = 640 2*9*15 = 270 50*4*2 = 50*8 = 400 20*7*5 = (20*5)*7 = 100*7 = 700 2*50*7 = 100*7 = 700 **Третий столбик:** 16*4*5-200 = 16*(4*5)-200 = 320-200 = 120 2*9*50-450 = (2*50)*9-450 = 900-450 = 450 25*7*4+300 = (25*4)*7+300 = 700+300 = 1000 4*9*15-240 = 36*15-240 = 540-240 = 300 7*47+7*53 = 7*(47+53) = 7*100 = 700 46*12+8*46 = 46*(12+8) = 46*20 = 920 89*87-89*77 = 89*(87-77) = 89*10 = 890 60*91-50*91 = 91*(60-50) = 91*10 = 910 54*49-49*53 = 49*(54-53) = 49*1 = 49 34*31-34*11 = 34*(31-11) = 34*20 = 680 135*7+5 = 945+5 = 950 44*7+26*7 = 7*(44+26) = 7*70 = 490 67*6-17*6 = 6*(67-17) = 6*50 = 300 2*43+2*57 = 2*(43+57) = 2*100 = 200 59*46-44*59 = 59*(46-44) = 59*2 = 118 2*94+8*94 = 94*(2+8) = 94*10 = 940 67*3-7*3 = 3*(67-7) = 3*60 = 180 327+420-127 = (327-127)+420 = 200+420 = 620 415+75+210 = 700 6*32+6*68 = 6*(32+68) = 6*100 = 600 49*15+49*5 = 49*(15+5) = 49*20 = 980 57*39-57*38 = 57*(39-38) = 57 96*95-94*95 = 95*(96-94) = 95*2 = 190 62*76-76*52 = 76*(62-52) = 76*10 = 760 9*58+58 = 58*(9+1) = 580 8*41-8 = 8*(41-1) = 8*40 = 320 2*62+38*2 = 2*(62+38) = 2*100 = 200 812-(68+612) = 812-680 = 132 69*3+69*7 = 69*(3+7) = 690 47*6-47*5 = 47*(6-5) = 47 2*79+8*79 = 79*(2+8) = 790 67*3-7*3 = 3*(67-7) = 3*60 = 180 687-(135+187) = 687-322 = 365 51*4+51*6 = 51*(4+6) = 510 373+289-73 = (373-73)+289 = 300+289 = 589 62*8-2*8 = 8*(62-2) = 8*60 = 480 959-(150+359) = 959-509 = 450 378+569-168 = (378-168)+569 = 210+569 = 779 6*15*9 = 54*15 = 810