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Second grade multiplication formula table 1~9
The multiplication formula table is as follows:

1× 1= 1, 1×2=2, 1×3=3, 1×4=4, 1×5=5, 1×6=6, 1×7=7, 1×8=8, 1×9=9。

2×2=4,2×3=6,2×4=8,2×5= 10,2×6= 12,2×7= 14,2×8= 16,2×9= 18。

3×3=9,3×4= 12,3×5= 15,3×6= 18,3×7=2 1,3×8=24,3×9=27。

4×4= 16,4×5=20,4×6=24,4×7=28,4×8=32,4×9=36。 5×5=25,5×6=30,5×7=35,5×8=40,5×9=45。 6×6=36,6×7=42,6×8=48,6×9=54。 7×7=49,7×8=56,7×9=63。 8×8=64,8×9=72。 9×9=8 1。

The multiplication table is a formula for primary school students, starting from "11" and ending at "998 1", but in ancient times it was the other way around, starting at "998 1" and ending at "224". Because the first two words of the formula are "99", people call it "Xiao 99" for short. It was only in the 13 and 14 centuries that it turned into the present situation.