先用計(jì)算器算出兩組前三個(gè)算式,再根據(jù)規(guī)律直接寫出其他算式的得數(shù)
2×2=3×3=
22×22=33×33=
222×222=333×333=
2222×2222=3333×3333=
22222×22222=33333×33333=
分析:先計(jì)算兩組前三個(gè)算式,得2×2=4,22×22=484,222×222=49284,然后寫出其他算式的結(jié)果;
3×3=9,33×33=1089,333×333=110889,規(guī)律:在結(jié)果中,尾數(shù)是9,1、8的個(gè)數(shù)為因數(shù)中3的個(gè)數(shù)減1,數(shù)字1后面是1個(gè)0,據(jù)此解答.
解答:解:2×2=4                             3×3=9
22×22=484                             33×33=1089
222×222=49284                         333×333=110889
2222×2222=4937284                     3333×3333=11108889
22222×22222=493817284                 33333×33333=1111088889
點(diǎn)評(píng):先計(jì)算前三個(gè)算式,根據(jù)其特點(diǎn),找出規(guī)律,據(jù)規(guī)律解答.
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