算一算 + =________ | - =________ | 1- =________ | + + =________ | - - =________ |
| 260+402=________ | 185+415=________ | 529-329=________ | 800-346=________ | 402-72=________ |
| 33×3=________ | 15×4=________ | 12×7=________ | 208×5=________ | 300×6=________. |




66260020045433099608410401800分析:(1)(2)(3)(4)(5)根据分数加减法的计算方法进行计算,
(6)(7)(8)(9)(10)根据整数加减法的计算方法进行计算,
(11)(12)(13)(14)(15)根据整数乘法的计算方法进行计算.
解答:
解:(1) + =![]() | (2) - =![]() | (3)1- =![]() | (4) + + =![]() | (5) - - =![]() |
| (6)260+402=662 | (7)185+415=600 | (8)529-329=200 | (9)800-346=454 | (10)402-72=330 |
| (11)33×3=99 | (12)15×4=60 | (13)12×7=84 | (14)208×5=1040 | (15)300×6=1800 |
点评:本题综合考查了学生的计算能力.注意计算结果的准确性.
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