PHIẾU BT SỐ 9: THỨ TỰ THỰC HIỆN PHÉP TÍNH
Bài 38: Thực hiện phép tính:
a) 3200:40.2
b) 3920:28:2
c) left(34.57−92.21right):35
d) 36:32+23.22−33.3
e) 38:34−95:93
f) 23.15+23.35
g) left[600−left(40:23+3.53right)right]:5
h) 32.103−left[132−left(52.4+22.15right)right].103
i) 16.122−left(4.232−59.4right)
k) 2100−left(1+2+22+23+…+299right)
l) 169.20110−17.left(83−1702:23+12012right)+27:24
Bài 39: Tìm số tự nhiên x, biết:
a) left(x−35right)−120=0
b) 310−left(118−xright)=217
c) 156−left(x+61right)=82
d) 814−left(x−305right)=712
e) 2x−138=23.32
f) 20−left[7.left(x−3right)+4right]=2
g) left[left(6x−39right):3right].28=5628
h) 4x3+12=120
i) 1500:left[left(30x+40right):xright]=30
k) 4.left(x−1right)+left[left(4750−2160right)−left(1750−1160right)right]=3000
l) 10−leftleft[left(x:3+17right):10+3.24right]:10right=5
m)2448:left[119−left(x−6right)right]=24
n) 165−left(35:x+3right).19=13