RS Aggarwal Vikash Aggarwal Class 3 Activity Book Composite Mathematics Activity Sheet 40 Solution

Activity sheet – 40

(1) 17 × 20 = 17 × 2 × 10 = (17 × 2) × 10 = 34 × 10 = 340

(2) 16 × 30 = 16 × 3 × 10 = (16 × 3) × 10 = 48 × 10 = 480

(3) 14 × 30 = 14 × 3 × 10 = (14 × 3) × 10 = 42 × 10 = 420

(4) 28 × 40 = 28 × 4 × 10 = (28 × 4) × 10 = 112 × 10 = 1120

(5) 25 × 50 = 25 × 5 × 10 = (25 × 5) × 10 = 125 × 10 = 1250

(6) 24 × 60 = 24 × 6 × 10 = (24 × 6) × 10 = 144 × 10 = 1440

(7) 32 × 70 = 32 × 7 × 10 = (32 × 7) × 10 = 224 × 10 = 2240

(8) 44 × 50 = 44 × 5 × 10 = (44 × 5) × 10 = 220 × 10 = 2200

(9) 53 × 80 = 53 × 8 × 10 = (53 × 8) × 10 = 424 × 10 = 4240

(10) 76 × 40 = 76 × 4 × 10 = (76 × 4) × 10 = 304 × 10 = 3040

(11) 13 × 300 = 13 × 3 × 100 = (13 × 3) × 100 = 39 × 100 = 3900

(12) 18 × 500 = 18 × 5 × 100 = (18 × 5) × 100 = 90 × 100 = 90000

(13) 24 × 200 = 24 × 2 × 100 = (24 × 2) × 100 = 48 × 100 = 4800

(14) 19 × 400 = 19 × 4 × 100 = (19 × 4) × 100 = 76 × 100 = 7600

(15) 23 × 300 = 23 × 3 × 100 = (23 × 3) × 100 = 69 × 100 = 6900

(16) 25 × 400 = 25 × 4 × 100 = (25 × 4) × 100 = 100 × 100 = 10000

(17) 3 × 3000 = 3 × 3 × 1000 = (3 × 3) × 1000 = 9 × 1000 = 9000

(18) 4 × 2000 = 4 × 2 × 1000 = (4 × 2) × 1000 = 8 × 1000 = 8000