Question

Tính nhanh :

a) 12 x 56 + 12 x 44

b) 45 x 12 - 45 x 2 + 45 x 90

Answer 1

A 12x56 + 12x44 =44+56=100

100X56=5600

b 45x12-45x2+45x90=90+2-12=80

80x45=3600

Answer 2

a) 12 x 56 + 12 x 44

=12.(56+44)

=12.100

=1200

b) 45 x 12 - 45 x 2 + 45 x 90

=45.(12-2+90)

=45.100

=4500

Answer 3

a)12x56+12x44

=12(56+44)

=12x100

=1200

 

b)45x12-45x2+45x90

=45(12-2+90)

=45x100

=4500

Answer 4

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Answer 5

ai tick mình mình cho nick zingme

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