口算.4.5+0.45=3.8-0.38=0.4÷0.004=0.15×0.04=47+49+37=53×14÷53=7.7×47-2.9=1000×18=-数学
题文
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答案
(1)4.5+0.45=4.95; (2)3.8-0.38=3.42; (3)0.4÷0.004=100; (4)0.15×0.04=0.006; (5)
=(
=1+
=1
(6)
=
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题文
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答案
(1)4.5+0.45=4.95; (2)3.8-0.38=3.42; (3)0.4÷0.004=100; (4)0.15×0.04=0.006; (5)
=(
=1+
=1
(6)
=
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