Question

Estimate the product of 856 and 172
to nearest 10
​

Answer 1

Answer:

Solution 7:

(i) 49\times5249×52

= 49 to the nearest ten = 50 and, 52 to the nearest ten = 50

∴ Required product = 50\times50=250050×50=2500

(ii) 63\times3863×38

63 to the nearest ten = 60 and, 38 to the nearest ten = 40

∴ Required product = 60\times40=240060×40=2400

(iii) 27\times5427×54

= 27 to the nearest ten = 30 and, 54 to the nearest ten = 50

∴ Required product = 30\times50=150030×50=1500

(iv) 53\times8553×85

= 53 to the nearest ten = 50 and, 85 to the nearest ten = 90

∴ Required product =

50\times90=450050×90=4500

(v) 74\times6774×67

= 74 to the nearest ten = 70 and, 67 to the nearest ten = 70

∴ Required product = 70\times70=490070×70=4900

(vi) 25\times3325×33

= 25 to the nearest ten = 30 and , 33 to the nearest ten = 30

∴ Required product =

30\times30=90030×30=900

Answer 2

Answer:

Estimated sum : 1030

Actual sum :1028