81-29= 310+90= 4800-600=
300+4200= 700+2400= 80÷9=
54÷7= 34÷5= 34÷8=
9×5= 450千米+550千米= 6噸-4噸500千克=
12時(shí)15分-9時(shí)=
分析:根據(jù)整數(shù)加減法、整數(shù)乘除法和質(zhì)量單位的換算方法進(jìn)行計(jì)算即可得到答案.
解答:解:
81-29=52 310+90=400 4800-600=4200
300+4200=4500 700+2400=3100 80÷9=8…8
54÷7=7…5 34÷5=6…5 34÷8=4…2
9×5=45 450千米+550千米=1000千米 6噸-4噸500千克=1噸500千克
12時(shí)15分-9時(shí)=3時(shí)15分
點(diǎn)評(píng):此題主要考查的是整數(shù)加減法、整數(shù)乘除法和質(zhì)量單位的換算方法的應(yīng)用.
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