Question

Tính nhẩm
a) 46.99
b) 24.198

c) 36600 : 50
d) 220000 : 5000

Answer 1

a, 46.99= 46.100 - 46 = 4600 - 46= 4554

b, 24. 198 = 24.2.99= 48. 99 = 48.100 - 48 = 4800 - 48 = 4752

c, 36600: 50 = 36600: 100 x 2= 366 x 2= 732

d, 220000:5000= 220:5 = 220 x 10 : 2= 2220:2= 1110

Answer 2

a) 46.99 = 46.100 - 46 = 4600 - 46 = 4554

b) 24.198 = 24.200 - 24.2 = 4800 - 48 = 4752

c) 36600 : 50 = 732

d) 220000 : 5000 = 44