计算,能简算的要简算. 3.25×0.45+6.75×0.45 7.5×102 5.64÷0.125÷
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计算,能简算的要简算.
3.25×0.45+6.75×0.45 | 7.5×102 | 5.64÷0.125÷8 |
26.9×0.48÷2.69 | 5.4×2.5×0.7 | 39.5×99+39.5. |
(1)3.25×0.45+6.75×0.45,
=(3.25+6.75)×0.45,
=10×0.45,
=4.5;
(2)7.5×102,
=7.5×(100+2),
=750+15,
=765;
(3)5.64÷0.125÷8,
=5.64÷(0.125×8),
=5.64÷1,
=5.64;
(4)26.9×0.48÷2.69,
=26.9÷2.69×0.48,
=1×0.48,
=0.48;
(5)5.4×2.5×0.7,
=13.5×0.7,
=9.45;
(6)39.5×99+39.5,
=39.5×(99+1),
=39.5×100,
=3950.
=(3.25+6.75)×0.45,
=10×0.45,
=4.5;
(2)7.5×102,
=7.5×(100+2),
=750+15,
=765;
(3)5.64÷0.125÷8,
=5.64÷(0.125×8),
=5.64÷1,
=5.64;
(4)26.9×0.48÷2.69,
=26.9÷2.69×0.48,
=1×0.48,
=0.48;
(5)5.4×2.5×0.7,
=13.5×0.7,
=9.45;
(6)39.5×99+39.5,
=39.5×(99+1),
=39.5×100,
=3950.