Решите арифметические цепочки, представленные в блоках Е, Ж, 3, И, К.

Решение арифметических цепочек: **Блок Е** 1) $7 \cdot 60 = 420; \; 420 - 300 = 120; \; 120 : 30 = 4; \; 4 + 46 = 50$ 2) $360 - 80 = 280; \; 280 : 4 = 70; \; 70 + 230 = 300; \; 300 \cdot 8 = 2400$ 3) $500 \cdot 7 = 3500; \; 3500 + 1500 = 5000; \; 5000 : 25 = 200; \; 200 - 10 = 190$ 4) $115 + 285 = 400; \; 400 \cdot 2 = 800; \; 800 - 300 = 500; \; 500 : 100 = 5$ **Блок Ж** 1) $2400 : 40 = 60; \; 60 + 240 = 300; \; 300 \cdot 7 = 2100; \; 2100 - 1900 = 200$ 2) $35 - 14 = 21; \; 21 : 7 = 3; \; 3 \cdot 25 = 75; \; 75 + 35 = 110$ 3) $60 \cdot 100 = 6000; \; 6000 - 5400 = 600; \; 600 : 50 = 12; \; 12 + 78 = 90$ 4) $290 + 340 = 630; \; 630 : 70 = 9; \; 9 \cdot 30 = 270; \; 270 - 180 = 90$ **Блок 3** 1) $30 \cdot 90 = 2700; \; 2700 + 1300 = 4000; \; 4000 : 50 = 80; \; 80 - 44 = 36$ 2) $15 + 65 = 80; \; 80 \cdot 3 = 240; \; 240 : 12 = 20; \; 20 - 20 = 0$ 3) $90 : 5 = 18; \; 18 - 11 = 7; \; 7 \cdot 9 = 63; \; 63 + 137 = 200$ 4) $640 - 560 = 80; \; 80 \cdot 4 = 320; \; 320 + 280 = 600; \; 600 : 30 = 20$ **Блок И** 1) $38 + 162 = 200; \; 200 \cdot 6 = 1200; \; 1200 - 400 = 800; \; 800 : 5 = 160$ 2) $5 \cdot 200 = 1000; \; 1000 - 710 = 290; \; 290 : 10 = 29; \; 29 + 31 = 60$ 3) $79 - 25 = 54; \; 54 : 6 = 9; \; 9 \cdot 9 = 81; \; 81 + 29 = 110$ 4) $52 : 4 = 13; \; 13 + 17 = 30; \; 30 : 6 = 5; \; 5 \cdot 9 = 45$ **Блок К** 1) $9 \cdot 70 = 630; \; 630 - 30 = 600; \; 600 : 12 = 50; \; 50 + 50 = 100$ 2) $102 + 8 = 110; \; 110 : 5 = 22; \; 22 \cdot 20 = 440; \; 440 - 40 = 400$ 3) $400 \cdot 7 = 2800; \; 2800 + 2200 = 5000; \; 5000 : 250 = 20; \; 20 + 80 = 100$ 4) $34 \cdot 5 = 170; \; 170 + 230 = 400; \; 400 : 80 = 5; \; 5 + 95 = 100$