Two Digit by One Digit Multiplication I

5th Grade Mental Math

40 x 3

120

70 x 2

140

30 x 8

240

50 x 7

350

20 x 9

180

60 x 7

420

30 x 4

120

80 x 7

560

90 x 4

360

70 x 9

630

23 x 3

20 x 3 is 60and 3 x 3 is 9

and 60 + 9 gives a sum of 69

41 x 7

40 x 7 is 280and 7 x 1 is 7

and 280 + 7 gives a sum of 287

72 x 2

70 x 2 is 140and 2 x 2 is 4

and 140 + 4 gives a sum of 144

54 x 4

50 x 4 is 200and 4 x 4 is 16

and 200 + 16 gives a sum of 216

26 x 3

20 x 3 is 60and 6 x 3 is 18

and 60 + 18 gives a sum of 78

32 x 4

30 x 4 is 120and 2 x 4 is 8

and 120 + 8 gives a sum of 128

83 x 2

80 x 2 is 160and 3 x 2 is 6

and 160 + 6 gives a sum of 166

75 x 4

70 x 4 is 280and 5 x 4 is 20

and 280 + 20 gives a sum of 300

91 x 6

90 x 6 is 540and 1 x 6 is 6

and 540 + 6 gives a sum of 546

33 x 5

30 x 5 is 150and 3 x 5 is 15

and 150 + 15 gives a sum of 165

22 x 7

20 x 7 is 140and 2 x 7 is 14

and 140 + 14 gives a sum of 154

44 x 2

40 x 2 is 80and 4 x 2 is 8

and 80 + 8 gives a sum of 88

52 x 3

50 x 3 is 150and 2 x 3 is 6

and 150 + 6 gives a sum of 156

65 x 4

60 x 4 is 240and 5 x 4 is 20

and 240 + 20 gives a sum of 260

71 x 8

70 x 8 is 560and 1 x 8 is 8

and 560 + 8 gives a sum of 568

93 x 2

90 x 2 is 180and 3 x 2 is 6

and 180 + 6 gives a sum of 186

47 x 2

40 x 2 is 80and 7 x 2 is 14

and 80 + 14 gives a sum of 94

29 x 3

20 x 3 is 60and 9 x 3 is 27

and 60 + 27 gives a sum of 87

68 x 4

60 x 4 is 240and 8 x 4 is 32

and 240 + 32 gives a sum of 272

31 x 6

30 x 6 is 180and 1 x 6 is 6

and 180 + 6 gives a sum of 186

Two Digit by One Digit Multiplication I

5th Grade Mental Math