Question

Please answer fast
$(20 + (10 \times 3 - 15) + 40$
$20 \div 4 \times 7 + 9 - 7$
$30 + 40 \div 8 \times 6 - 10$
$10 - 12 \div 12 + 10 \div 5 - 3$

Answer 1

20 +(10×3-15)+40= 20+(30-15)+40= 20+15+40=75
20÷4×7+9-7=5×7+9-7=35+9-7=37
30+40÷8×6-10=30+5×6-10=30+30-10=60-10=50
10-12÷12+10÷5-3=10-1+2-3=12-4=8