脱式计算.(能简算的要简算) 7.02×1.02 1.125÷0.09 2001×0.54+2001×0.46 0.64×0.25+0.75 0.78÷26+0.5×0.02 [2.8-2.8×(2.8-2.8)]÷0.7 8×[1÷(3.
问题描述:
脱式计算.(能简算的要简算) 7.02×1.02 |
1.125÷0.09 |
2001×0.54+2001×0.46 | 0.64×0.25+0.75 |
0.78÷26+0.5×0.02 | [2.8-2.8×(2.8-2.8)]÷0.7 |
8×[1÷(3.2-2.95)] | 33.4-26.465÷(2.6+4.1) |
答
(1)7.02×1.02,
=7.02×(1+0.02),
=7.02+7.02×0.02,
=7.02+0.1404,
=7.1604;
(2)1.125÷0.09,
=112.5÷9,
=12.5;
(3)2001×0.54+2001×0.46,
=2001×(0.54+0.46),
=2001×1,
=2001;
(4)0.64×0.25+0.75,
=0.16+0.75,
=0.91;
(5)[2.8-2.8×(2.8-2.8)]÷0.7,
=[2.8-2.8×0]÷0.7,
=2.8÷0.7,
=4;
(6)0.78÷26+0.5×0.02,
=0.03+0.01,
=0.04;
(7)8×[1÷(3.2-2.95)],
=8×[1÷0.25],
=8×4,
=32;
(8)33.4-26.465÷(2.6+4.1),
=33.4-26.465÷6.7,
=33.4-3.95,
=29.45.