Câu hỏi của nhat anh nguyen

Question

Tính nhanh:

a) 36.(-57)-57.64

b) 32.(-17)+(-18).17-50.13

c) -(-35)+12-|-35|-42

d) (-15-12):(-3)^2+5-13.(-2)+(-64):2^3

e) (135-35).(-37)+37.(-42-58)

Tiên Hồ Đỗ Thị Cẩm · Accepted Answer

a) $36.\left(-57\right)-57.64$

$=36.\left(-57\right)+\left(-57\right).64=\left(-57\right).\left(36+64\right)$

$=\left(-57\right).100=-5700$

b)$32.\left(-17\right)+\left(-18\right).17-50.13$

$=\left(-32\right).17+\left(-18\right).17-50.13$

$=17.\left(-32-18\right)-50.13=17.\left(-50\right)+\left(-50\right).13$

$=\left(-50\right).\left(17+13\right)=\left(-50\right).30=-150$

Câu trả lời:

a) $36.\left(-57\right)-57.64$

$=36.\left(-57\right)+\left(-57\right).64=\left(-57\right).\left(36+64\right)$

$=\left(-57\right).100=-5700$

b)$32.\left(-17\right)+\left(-18\right).17-50.13$

$=\left(-32\right).17+\left(-18\right).17-50.13$

$=17.\left(-32-18\right)-50.13=17.\left(-50\right)+\left(-50\right).13$

$=\left(-50\right).\left(17+13\right)=\left(-50\right).30=-150$

Tiên Hồ Đỗ Thị Cẩm · Answer

c)$-\left(-35\right)+12-|-35|-42$

$=35+12-35-42=12-42=-30$

d)$\left(-15-12\right):\left(-3\right)^2+5-13.\left(-2\right)+\left(-64\right):2^3$

$=-27:9+5+26-64:8=-3+5+26-8=20$

e)$\left(135-35\right).\left(-37\right)+37.\left(-42-58\right)=100.\left(-37\right)+37.\left(-100\right)$

$=\left(-100\right).37+37.\left(-100\right)=\left(-100\right).\left(37+37\right)$

$=\left(-100\right).74=-7400$

Chúc em học tốt!!!!!!