题目内容
7963-500×8 | 4800-578-1422 | 536+377+64 |
5×200+732 | 700÷70+3609 | 421-270÷90. |
解:(1)7963-500×8,
=7963-4000,
=3963;
(2)4800-578-1422,
=4800-(578+1422),
=4800-2000,
=2800;
(3)536+377+64,
=(536+64)+377,
=600+377,
=977,
(4)5×200+732,
=1000+732,
=1732;
(5)700÷70+3609,
=10+3609,
=3619;
(6)421-270÷90,
=421-3,
=418.
分析:(1)先算乘法,再算减法,
(2)运用减法的性质进行简算,
(3)运用加法的交换律、结合律进行简算,
(4)先算乘法,再算加法,
(5)先算除法,再算加法,
(6)先算除法,再算减法.
点评:考查了整数四则混合运算的顺序,能运用运算定律简算的要简算.
=7963-4000,
=3963;
(2)4800-578-1422,
=4800-(578+1422),
=4800-2000,
=2800;
(3)536+377+64,
=(536+64)+377,
=600+377,
=977,
(4)5×200+732,
=1000+732,
=1732;
(5)700÷70+3609,
=10+3609,
=3619;
(6)421-270÷90,
=421-3,
=418.
分析:(1)先算乘法,再算减法,
(2)运用减法的性质进行简算,
(3)运用加法的交换律、结合律进行简算,
(4)先算乘法,再算加法,
(5)先算除法,再算加法,
(6)先算除法,再算减法.
点评:考查了整数四则混合运算的顺序,能运用运算定律简算的要简算.
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