3×4= 20÷5= 12÷4= 7×8= 9×3=

6×5= 15÷3= 16÷8= 5×9= 8×4=

7×6= 24÷6= 18÷6= 9×4= 7×7=

4×9= 28÷7= 24÷8= 6×8= 10÷5=

5×8= 30÷6= 25÷5= 10×3= 9×6=

Expand knowledge:

Multiplication is a shortcut to add the same numbers, and its operation result is called product. Multiplication commutative law is the multiplication of two numbers, the positions of two factors are exchanged, and the product is unchanged; The law of multiplicative association is the multiplication of three numbers. First, multiply the first two numbers, then the third number, or multiply the last two numbers.

Multiplied by the first number, the product remains the same; Multiplication and division is the sum (or difference) of two numbers multiplied by a number, which is equivalent to multiplying the two numbers by this number respectively, and then adding (or subtracting) the two products.

Division is one of the four operations. Given the product of two factors and a non-zero factor, the operation of finding another factor is called division. The formula of division operation is dividend/divisor = quotient, dividend/quotient = divisor, quotient × divisor = dividend.

Multiplication formula:

1× 1= 1。

1×2=2 2×2=4。

1×3=3 2×3=6 3×3=9。

1×4=4 2×4=8 3×4= 12 4×4= 16。

1×5=5 2×5= 10 3×5= 15 4×5=20 5×5=25。

1×6=6 2×6= 12 3×6= 18 4×6=24 5×6=30 6×6=36。

1×7=7 2×7= 14 3×7=2 1 4×7=28 5×7=35 6×7=42 7×7=49。

1×8=8 2×8= 16 3×8=24 4×8=32 5×8=40 6×8=48 7×8=56 8×8=64。

1×9=9 2×9= 18 3×9=27 4×9=36 5×9=45 6×9=54 7×9=63 8×9=72 9×9=8 1。