题目内容
列式计算.
(1)用14.1与5.9的和,乘以它们的差,积是多少?
(2)6.8与5.7的和,除以0.25,商是多少?
(3)4.8与2.7的和乘以3.62,积是多少?
(1)用14.1与5.9的和,乘以它们的差,积是多少?
(2)6.8与5.7的和,除以0.25,商是多少?
(3)4.8与2.7的和乘以3.62,积是多少?
分析:(1)先算14.1与5.9的和,14.1与5.9的差,所得的和乘所得的差即可;
(2)先算6.8与5.7的和,所得的和除以0.25即可;
(3)先算4.8与2.7的和.所得的和乘3.62即可.
(2)先算6.8与5.7的和,所得的和除以0.25即可;
(3)先算4.8与2.7的和.所得的和乘3.62即可.
解答:解:(1)(14.1+5.9)×(14.1-5.9)
=20×8.2
=164
答:积是164.
(2)(6.8+5.7)÷0.25
=12.5÷0.25
=50.
答:商是50.
(3)(4.8+2.7)×3.62
=7.5×3.62
=27.15.
答:积是27.15.
=20×8.2
=164
答:积是164.
(2)(6.8+5.7)÷0.25
=12.5÷0.25
=50.
答:商是50.
(3)(4.8+2.7)×3.62
=7.5×3.62
=27.15.
答:积是27.15.
点评:根据题意,先弄清运算顺序,然后再列式解答.
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