题目内容
| 能简算的用简便方法算. 9.28+1.82÷0.7 | (71.2-71.2×0.9)÷0.25 | 6.5×2.3+6.5×6.7+6.5 |
| 7.8÷0.25÷4 | 1.37×99+1.37 | 4.8×6.2-12.4. |
(1)9.28+1.82÷0.7,
=9.28+2.6,
=11.88;
(2)(71.2-71.2×0.9)÷0.25,
=(1-0.9)×71.2÷0.25,
=0.1×71.2÷0.25,
=7.12÷0.25,
=28.48;
(3)6.5×2.3+6.5×6.7+6.5,
=6.5×(2.3+6.7+1),
=6.5×10,
=65;
(4)7.8÷0.25÷4,
=7.8÷(0.25×4),
=7.8÷1,
=7.8;
(5)1.37×99+1.37,
=1.37×(99+1),
=1.37×100,
=137;
(6)4.8×6.2-12.4,
=29.76-12.4,
=17.36.
=9.28+2.6,
=11.88;
(2)(71.2-71.2×0.9)÷0.25,
=(1-0.9)×71.2÷0.25,
=0.1×71.2÷0.25,
=7.12÷0.25,
=28.48;
(3)6.5×2.3+6.5×6.7+6.5,
=6.5×(2.3+6.7+1),
=6.5×10,
=65;
(4)7.8÷0.25÷4,
=7.8÷(0.25×4),
=7.8÷1,
=7.8;
(5)1.37×99+1.37,
=1.37×(99+1),
=1.37×100,
=137;
(6)4.8×6.2-12.4,
=29.76-12.4,
=17.36.
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