5×9= 9×9= 7×7= 4×4= 7×5=
9×6= 6×7= 5×4= 5×2= 4×6=
4×3= 3×6= 7×9= 9×5= 3×5=
4×2= 7×8= 9×4= 5×5+9= 8×3+24=
7×2+9= 1×4+5= 2×2+2= 6×5+5=
分析:根據(jù)九九乘法口訣即可解答問題.
解答:
解:5×9=45 9×9=81 7×7=49 4×4=16 7×5=35
9×6=54 6×7=42 5×4=20 5×2=10 4×6=24
4×3=12 3×6=18 7×9=63 9×5=45 3×5=15
4×2=8 7×8=56 9×4=36 5×5+9=34 8×3+24=48
7×2+9=23 1×4+5=9 2×2+2=6 6×5+5=35
點(diǎn)評:此題考查學(xué)生的乘法口訣的識(shí)記情況,是需要熟記的內(nèi)容.
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