11. Вычисли. Запиши результат под чертой.

Решим примеры из учебника по порядку. **Блок А** 1) $54 : 6 = 9$; $9 + 34 = 43$; $43 - 2 = 41$; $41 - 56 = -15$ 2) $80 - 24 = 56$; $56 : 7 = 8$; $8 \cdot 8 = 64$; $64 + 36 = 100$ 3) $4 \cdot 40 = 160$; $160 + 260 = 420$; $420 : 6 = 70$; $70 - 45 = 25$ 4) $100 - 10 = 90$; $90 \cdot 90 = 8100$; $8100 + 1900 = 10000$; $10000 : 100 = 100$ **Блок Б** 1) $80 : 40 = 2$; $2 \cdot 9 = 18$; $18 + 13 = 31$; $31 - 30 = 1$ 2) $90 \cdot 7 = 630$; $630 + 370 = 1000$; $1000 : 40 = 25$; $25 - 12 = 13$ 3) $115 + 135 = 250$; $250 : 5 = 50$; $50 \cdot 8 = 400$; $400 - 395 = 5$ 4) $900 : 6 = 150$; $150 + 350 = 500$; $500 \cdot 5 = 2500$; $2500 - 600 = 1900$ **Блок В** 1) $530 + 170 = 700$; $700 : 10 = 70$; $70 \cdot 8 = 560$; $560 - 280 = 280$ 2) $7200 : 80 = 90$; $90 - 30 = 60$; $60 \cdot 40 = 2400$; $2400 + 2600 = 5000$ 3) $430 - 190 = 240$; $240 : 8 = 30$; $30 + 60 = 90$; $90 - 80 = 10$ 4) $140 \cdot 50 = 7000$; $7000 - 1600 = 5400$; $5400 : 90 = 60$; $60 + 44 = 104$ **Блок Г** 1) $100 - 77 = 23$; $23 \cdot 3 = 69$; $69 + 51 = 120$; $120 : 12 = 10$ 2) $200 : 4 = 50$; $50 + 70 = 120$; $120 - 5 = 115$; $115 - 240 = -125$ 3) $23 + 47 = 70$; $70 : 7 = 10$; $10 \cdot 16 = 160$; $160 - 90 = 70$ 4) $20 \cdot 7 = 140$; $140 - 50 = 90$; $90 : 5 = 18$; $18 + 33 = 51$ **Блок Д** 1) $620 - 140 = 480$; $480 : 60 = 8$; $8 \cdot 2 = 16$; $16 + 150 = 166$ 2) $24 + 126 = 150$; $150 \cdot 3 = 450$; $450 : 9 = 50$; $50 - 34 = 16$ 3) $8 \cdot 4 = 32$; $32 + 48 = 80$; $80 : 2 = 40$; $40 \cdot 6 = 240$ 4) $620 + 190 = 810$; $810 : 90 = 9$; $9 \cdot 20 = 180$; $180 - 180 = 0$