小学数学。会的给我看看怎么做,,谢谢!高悬赏!
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3000-297=3000-300+3=2700+3=2703
31x102
=31x00+31x2
=3100+62
=3162
1/5÷6/25-2/7x7/32
=5/6-1/16
=40/48-3/48
=37/48
(7/12+3/8-23/24)x24
=7/12x24+3/8x24-23/24x24
=14+9-23
=0
8.8+6.75+9.2-0.25
=(8.8+9.2)-(6.75+0.25)
=18-7
=11
6.3x0.54+5.4x0.37
=6.3x0.54+0.54x3.7
=(6.3+3.7)x0.54
=10x0.54
=5.4
31x102
=31x00+31x2
=3100+62
=3162
1/5÷6/25-2/7x7/32
=5/6-1/16
=40/48-3/48
=37/48
(7/12+3/8-23/24)x24
=7/12x24+3/8x24-23/24x24
=14+9-23
=0
8.8+6.75+9.2-0.25
=(8.8+9.2)-(6.75+0.25)
=18-7
=11
6.3x0.54+5.4x0.37
=6.3x0.54+0.54x3.7
=(6.3+3.7)x0.54
=10x0.54
=5.4
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