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1.
4 2 0.04
4 0.19 0.12
2.
0.24
1.25
4.7 1.3
2 0.01
3.
40.4÷0.5+7.5 40.4÷(0.5+7.5)
=80.8+7.5 =40.4÷8
=88.3 =5.05
0.01×(3.5÷0.07-25) [5×(3.2+4.06﹚]÷1.2
=0.01×(50-25) =[5×7.26]÷1.2
=0.01×25 =36.3÷1.2
=0.25 =30.25
4.
1.25×0.7×8 7.02+3.9+1.98+2.1
=1.25×8×0.7 =(7.02+1.98)+(3.9+2.1)
=10×0.7 =9+6
=7 = 15
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