2022.09.26 Class4 Math BookA Unit 1&2

125 x 8 = ?

30 x 60 = ?

• 1800

• 180

• 90

• 18000

18 x 66 + 24 x 18 = ?

• 18 x ( 66 + 24 )

• 18 x 66 + 24

• 66 x ( 18 + 24 )

• 24 x ( 66 + 18)

77 x 25 - 25 x 67 = ?

• 25 x ( 77 - 67 )

• 25 x ( 77 + 67 )

• 77 x 25 - 67

• ( 77 - 25 ) x 67

99 x 36 = ?

• 100 x 36 - 1 x 36

• 100 - 1 x 36

• 100 x 36 - 99

• 99 x 36 + 1 x 36

If we need to calculate 25 x 17 x 4 in a simpler way, we have to calculate _____ first.

• 25 x 4

• 25 x 17

• 17 x 4

If we need to calculate 33 x 8 x 50 in a simpler way, we have to calculate _____ first.

• 8x 50

• 33 x 8

• 33 x 5

7 x 128 = ?

306 x 28 = ?