19.
直接写出下面各题的得数 2.4×5= | 1-0.78= | 1.4÷10= | 3.6×0.4= | 10.4×0÷0.72= |
0.45÷3= | 0.68+0.3= | 3.4÷0.17= | 10-0.125×8= | 3.8-3.8÷19= |
5.1÷0.51= | 2.5×(1.7+0.3)= | 0.2×7×0.5= | 25.6×1.8+8.2×25.6= |
17.甲数是10.88,乙数比甲数的3倍还多0.02,乙数是多少?正确的算式是( )
A. | 10.88+0.02 | B. | (10.88-0.02)÷3 | C. | 10.88×3+0.02 |
16.2.83÷0.27的商是10,余数是( )
A. | 13 | B. | 1.3 | C. | 0.13 |
15.要简算9×0.25+0.25,下面算式正确的是( )
A. | (9+1)×0.25 | B. | 9×(0.25+0.25) | C. | (10-1)×0.25 |
14.如果a×b>a,则b( )1,如果a÷b>a,则b( )1.
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