Exercise 3B
Q1 | Ex-3B |Class 7 | Decimals | S.Chand | Composite Mathematics | Chapter 3 | myhelper
Question 1
(i) 8.37×10
=83.7
(ii) 4.6×10
=46
(iii) 49.87×100
=4987
(iv) 4.907×10
=49.07
(v) 0.0000078×1000
=0.0078
(vi) 0.00805×100
=0.805
(vii) 0.0893×10000
=893
(viii) 357.126×10000
=3571260
Q2 | Ex-3B |Class7 | Decimals | S.Chand | Composite Mathematics | Chapter 3 | myhelper
Question 2
(i) 0.9×0.4
Sol : 0.36
(ii) 0.07×0.05
Sol : 0.0035
(iii) 0.008×3
Sol : 0.024
(iv) 0.006×0.009
Sol : 0.000054
(v) 0.8×0.09
Sol : 0.072
(vi) 2.63×0.0004
Sol : 0.001052
(vii) 150×0.007
Sol : 1.05
(viii) 52.8×0.007
Sol : 0.3696
Q3 | Ex-3B |Class 7 | Decimals | S.Chand | Composite Mathematics | Chapter 3 | myhelper
Question 3
(i) 5.9×2.3
Sol : 13.57
(ii) 0.009×0.049
Sol : 0.000441
(iii) 0.678×860
Sol : 583.08
(iv) 0.0095×81.7
Sol : 0.77615
(v) How many decimal places does (1.4)3 have?
Sol :
=2.744
=3 decimal places
No comments:
Post a Comment