A) 1045 + 1126 + 155 + 174 =(1045+155)+(1126+174) (0,5Đ) =1200+...

Question

Câu 2. a) 1045 + 1126 + 155 + 174 =(1045+155)+(1126+174) (0,5đ) =1200+1300=2500 (0,5đ) b) 25.37.2.4=(25.4)(37.2) (0,5đ) =100.74=7400 (0,5đ) c)119.(46+54)=119.100=11900 (1đ)

Accepted Answer

1a 5 2 – 4 2 = 9 0,5 1b 9 6 : 9 5 + 8 3 : 8 2 = 9 + 8 = 17 0,25 0,25 1c 12.6 :2 = 36 0,5 1d 226 24   = 226 + 24 =250 0,25 0,25 2a BCNN(24,16)= 48 0,5 2b ƯCLN(56,140)= 28 0,5

A) 1045 + 1126 + 155 + 174 =(1045+155)+(1126+174) (0,5Đ) =1200+...

Câu 2. a) 1045 + 1126 + 155 + 174

=(1045+155)+(1126+174) (0,5đ)

=1200+1300=2500 (0,5đ)

b) 25.37.2.4=(25.4)(37.2) (0,5đ)

=100.74=7400 (0,5đ)

c)119.(46+54)=119.100=11900 (1đ)

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