Multiplication

Review 6 4s 4+4+4+4+4+4= 24 8 12 16 20

3 3 3 3 3 3 18 6 3s 18 18 6 3 ( )+( )+( )+( )+( )+（ ）=( ) ( )+( )+( )+( )+( )+（ ）=( ) 3 3 3 3 3 3 18 6 3s 18 （ ）（ ）equals ( ) 18 （ ）×（ ）=( ) 6 3

3 3 3 3 3 3 18 6 18 3 ( )+( )+( )+( )+( )+（ ）=( ) （ 6 ）×（ ）=( 18 ) ( )+( )+( )+( )+( )+（ ）=( ) 3 3 3 3 3 3 18 6 18 （ 6 ）×（ ）=( 18 ) 3 factor factor product Sign of multiplication

2 2 2 2 2 2 12 6 2s 12 6 2 12 ( )+( )+( )+( )+( )+（ ）=( ) ( )+( )+( )+( )+( )+（ ）=( ) 2 2 2 2 2 2 12 6 2s （ ）（ ）equals ( ) 12 （ ）×（ ）=( ) 6 2 12 Shanghai Zhabei Experimental Primary School

4 4 4 4 4 20 5 4s 20 20 5 4 ( )+( )+( )+( )+( )=( ) （ ）（ ）equals ( ) ( )+( )+( )+( )+( )=( ) 4 4 4 4 4 20 （ ）（ ）equals ( ) 5 4s 20 20 （ ）×（ ）=( ) 5 4 factor factor product Shanghai Zhabei Experimental Primary School Sign of multiplication

5+5+5+5+5+5 =30 × 6 5 = 30 Shanghai Zhabei Experimental Primary School

7+7 =14 × 2 7 = 14 Shanghai Zhabei Experimental Primary School

5+5+5 =15 （1） = 3 × 5 15 Shanghai Zhabei Experimental Primary School

4+4+4+4+4+4 =24 （2） = 6 × 4 24 Shanghai Zhabei Experimental Primary School

8+8+8 =24 （3） 3 × = 8 24 Shanghai Zhabei Experimental Primary School

6+6+6+6 = 24 （4） = 4 × 6 24 Shanghai Zhabei Experimental Primary School

2+2+2+2+2+2+2+2 = 16 （5） = 8 × 2 16 Shanghai Zhabei Experimental Primary School

How many apples? Can you use multiplication? 1+2+2+3=8 2+2+2+2=8 4 X 2=8

2+2+2+2+4 4 → 2+2+2+2+2+2 = 12 2 2 × 6 2 = 12 Shanghai Zhabei Experimental Primary School

10 + 10 + 10+5+5 = 40 10 = 4 × 10 40 Shanghai Zhabei Experimental Primary School

10 + 10 + 10+5+5 = 40 5 5 5 5 5 5 × = 8 5 40 Shanghai Zhabei Experimental Primary School

2+2+2+2+4 4 → × 6 2 = 12 2 2 2+2+2+2+4 → 3 × 4 = 12 4 4 2+2+2+2+4 → 2 × 6 = 12 6 6 Shanghai Zhabei Experimental Primary School