Điền dấu (>, <, =) thích hợp vào chỗ chấm:

a) 7 × 9 – 3 .... 7 × (9 – 3)                             b) 75 – 5 × 7 .... (75 – 5) × 7

c) 81 : 9 – 3 .... 81 : (9 – 6)                           d) 36 + 27 : 9 .... (36 + 27) : 9

a) 1 000 – (223 + 737)

= .................................

= .................................

b) (428 + 139) : 7

= ................................

= ................................

c) (236 – 128) × 9

= ...............................

= ...............................

Số lớn

Số bé

Số lớn gấp mấy lần số bé?

21

7

40

8

24

4

10

5

54

6

a) 417 – (37 – 20) = ..........................

= ..........................

c) 248 : (4 : 2) = ..........................

   = ..........................

b) 826 – (70 + 30) = ..........................

= ..........................

d) (300 + 100) × 2 = ..........................

= ..........................

a) 450 – (25 – 10) = ....................

                              = ....................

450 – 25 – 10 = ...........................

  = ............................

c) 410 – (50 + 30) = ....................

                              = ....................

410 – 50 + 30 = ...........................

                       = ...........................

b) 36 : 6 : 2 = .........................

                    = .........................

36 : (6 : 2) = ...........................

                  = ...........................

d) 11 × 6 : 3 = ........................

                     = .......................

11 × (6 : 3) = .........................

                   = .........................