计算下面各题(能简便计算的要简便计算)
13×70﹣4872÷24 9.43﹣2.6+8.57﹣3.4 (2.8﹣1.6)×0.8÷3.2
×﹣÷7 (÷﹣)÷ ×[÷(﹣)].
怎样简便怎样算
15×42﹣1308÷2 8.4﹣9.1÷1.3+5.8 4.7×68+53×6.8
2013× ÷8+÷+1÷8 7.1﹣0.45×(6.28+3.52)
观察下面备题的计算过程和结果,判断是否正确,对的画“√”错的画“×”,并改正过来.
(1)8×
=8=
=72
(2)14.3﹣
=14.3﹣()
=14.3﹣9.6
=4.7
(3)×84+101
=()×185
=
=
=39
(4)12.75﹣[6]
=12.75﹣[6]
=12.75﹣0
=12.75.
试题篮
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