Question

a) 29.75.2 +58.50 - 58.25

b)9.39.3 + 27.63 - 2.27

c) 64.46.2 + 16.32.8 + 128.22

d) 6.25.11 + 5.22.3 + 66.14 + 33.66

e) 12.35 + 35.182 - 35.94

f) 48.19 + 48.115 + 134. 52

g) 27.121 - 87.27 + 73.34

h) 125.98 - 125.46 - 52.25

Answer 1

a, 5800

b, 2700

c, 12800

d, 5082

e, 10080

f, 13400

g, 5020

h, 5200

Answer 2

a) 29.75.2+58.50-58.25 b) 9.39.3+27.63-2.27

= (29.2).75+58.50-58.25 = (9.3).39+27.63-2.27

= 58.75+58.50-58.25 = 27.39+27.63-2.27

= 58.(75+50-25) = 27.(39+63-2)

= 58.100 = 27.100

= 5800. = 2700.

c)64.46.2+16.32.8+128.22 d)6.25.11+5.22.3+66.14+33.66

= (64.2).46+(16.8).32+128.22 = (6.11).25+5.(22.3)+66.14+33.66

= 128.46+128.32+128.22 = 66.25+5.66+66.14+33.66

= 128.(46+32+22) = 66.(25+5+14+33)

= 128.100 = 66.77

= 12800. = 5082

Answer 3

a) 29 . 75 . 2 + 58 . 50 - 58 . 25

= (29 . 2) . 75 + 58 . 50 - 58 . 25

= 58 . 75 + 58 . 50 - 58 . 25

= 58 . (75 + 50 - 25)

= 58 . (125 - 25)

= 58 . 100

= 5800

b) 9 . 39 . 3 + 27 . 63 - 2 . 27

= (9 . 3) . 39 + 27 . 63 - 2 . 27

= 27 . 39 + 27 . 63 - 2 . 27

= 27 . (39 + 63 - 2)

= 27 . (102 - 2)

= 27 . 100

= 2700

c) 64 . 46 . 2 + 16 . 32 . 8 + 128 . 22

= (64 . 2) . 46 + (16 . 8) . 32 + 128 . 22

= 128 . 46 + 128 . 32 + 128 . 22

= 128 . (46 + 32 + 22)

= 128 . (78 + 22)

= 128 . 100

= 12800

d) 6 . 25 . 11 + 5 . 22 . 3 + 66 . 14 + 33 . 66

= (6 . 11) . 25 + 5 . (22 . 3) + 66 . 14 + 33 .66

= 66 . 25 + 5 . 66 + 66 . 14 + 33 .66

= 66 . (25 + 5 + 14 + 33)

= 66 . (30 + 14 + 33)

= 66 . (44 + 33)

= 66 . 77

= 5082

e) 12 . 35 + 35 . 182 - 35 . 94

= 35 . (12 + 128 - 94)

= 35 . (140 - 94)

= 35 . 46

= 1610

f) 48 . 19 + 48 . 115 + 134 . 52

= 48 . (19 + 115) + 134 . 52

= 48 . 134 + 134 . 52

= 134 . (48 + 52)

= 134 . 100

= 13400

g) 27 . 121 - 87 . 27 + 73 . 34

= 27 . (121 - 87) + 73 . 34

= 27 . 34 + 73 . 34

= (27 + 73) . 34

= 100 . 34

= 3400

h) 125 . 98 - 125 . 46 - 52 . 25

= 125 . (98 - 46) - 52 . 25

= 125 . 52 - 52 . 25

= (125 - 25) . 52

= 100 . 52

= 5200