X×3=1000-40 X÷40=36÷18
Х×3=1000-40 Х×3=960 Х=960÷3 Х=320 __________ 320×3=1000-40 Х÷40=36÷18 Х÷40=2 Х=40×2 Х=80 __________ 80÷40=36÷18