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简介：
1.0.25×4.78×4
=0.25×4×4.78
=1×4.78
=4.78
2.1.4×99+1.4
=1.4×(99+1）
=1.4×100
=140
3.310÷2.5÷4
=310÷(2.5×4）
=310÷10
=31
4.0.98×2.5
=(1-0.02)×2.5
=1×2.5-0.02×2.5
=2.5-0.05
=2.45
5.56.8+22.8
=56.8+23-0.2
=79.8-0.2
=79.6
6.5.48+3.99
=5.48+(4-0.01)
=5.48+4-0.01
=9.47
7.34.5-2.98
=34.5-3+0.02
=31.5+0.02
=31.52
8.0.25×7×3.6
=0.25×7×(4×0.9）
=0.25×4×7×0.9
=1×7×0.9
=6.3
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