a, 100/2+56
=50+56
=106
b, 100+60/3
=100+20
=120
c, 100*5-56
=500-56
=444
a, 100/2+56
=50+56
=106
b, 100+60/3
=100+20
=120
c, 100*5-56
=500-56
=444
Điền (<; >; =).
75 203 ... 75 023 49 998 ... 50 002 81 102 ... 79 837
55 155 ... 55 155 100 000 ... 99 990 + 10 56 000 + 3000 ... 60 000
Tính giá trị của biểu thức:
a) 90 – ( 30 – 20) = ..........................
= ..........................
90 – 30 – 20 = ..........................
= ..........................
b) 100 – (60 + 10) = ..........................
= ..........................
100 - 60 + 10 = ..........................
= ..........................
c) 135 – (30 + 5) = ..........................
= ..........................
135 – 30 – 5 = ..........................
= ..........................
d) 70 + (40 – 10) = ..........................
= ..........................
70 + 40 – 10 = ..........................
= ..........................
Đúng ghi Đ, sai ghi S
37 - 5 x 5 = 12
180 : 6 + 30 = 60
30 + 60 x 2 = 150
282 - 100 : 2 = 91
x + 60 = 100 + 100
20 × 20
40 × 40
60 × 60
80 × 80
100 × 100
Tính nhẩm:
100 + 20 + 4 =
300 + 60 + 7 =
800 + 10 + 5 =
20 × 20
40 × 40
60 × 60
80 × 80
100 × 100
100-56/789-567
tính nhanh:
1 + 3 + 5 + 7 + 9 + 100 + 98 +77 +54 +60 +18 =