3.6+4.4= 0.375+0.625= 5-0.12=
0.48+5.9= 4.3-1.6= 0.74-0.4=
8×(125-25)= 48+52÷4= 160+40÷4=
(12-12)÷(12+12)= 26×8÷26×8=
分析:根據(jù)小數(shù)和整數(shù)加減方法的計算方法進(jìn)行計算;
26×8÷26×8按照從左向右的順序進(jìn)行計算.
解答:解:
3.6+4.4=8, 0.375+0.625=1, 5-0.12=4.88,
0.48+5.9=6.38, 4.3-1.6=2.7, 0.74-0.4=0.34,
8×(125-25)=800, 48+52÷4=61, 160+40÷4=170,
(12-12)÷(12+12)=0, 26×8÷26×8=64.
點評:口算時,注意運算符號和數(shù)據(jù),然后再進(jìn)一步計算.
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