Question

. 36 +60 :4.2+ 34
42 + 54:3.2-18
(760 + 100) - (430 + 230)
(970-340) + (250 + 120)​

Answer 1

Ответ:

$1)36 + 60 \div 4.2 + 34 = 74 \frac{2}{7} \\ 60 \div 4.2 = 600 \div 42 = 14 \frac{12}{42} = 4 \frac{2}{7} \\ 36 + 4 \frac{2}{7} = 40 \frac{2}{7} + 34 = 74 \frac{2}{7}$

$2)42 + 54 \div 3.2 - 18 = 40 \frac{9}{16} \\ 54 \div 3.2 = 540 \div 32 = 16 \frac{18}{32} = 16 \frac{9}{16 } \\ 42 + 16 \frac{9}{16} = 58 \frac{9}{16} - 18 = 40 \frac{9}{16}$

$3)(760 + 100) - (430 + 230) = 860 - 660 = 200$

$4)630 + 370 = 1000$