Rounding to 1 s.f
Round 1265 to 1 significant figure.
1000
Round 1765 to 2 significant figures.
2000
Round 8142 to 3 significant figures.
Estimate the value of 156 + 210
360
Estimate the value of 156×25
6000
Round 24.53 to 1 significant figure.
20
Round 1465 to 2 significant figures.
1500
Round 159.4 to 3 significant figures.
159
Estimate the value of1472 - 785
700
Estimate the value of 3648 ÷ 76
50
Round 9.57 to 1 significant figure.
10
Round 1.835 to 2 significant figures.
1.8
Round 3.158 to 3 significant figures.
3.16
Estimate the value of 14.6 + 37.1
40
Estimate the value of (18.3+62.8)/0.97
80
Round 0.0731 to 1 significant figure.
0.07
Round 0.0267 to 2 significant figures.
0.027
Round 4.9951 to 3 significant figures.
5.00
Estimate the value of 2378 + 456 - 279
2200
Estimate the value of (91.25 × 4.87)/2.91
150
Round 0.00953 to 1 significant figure.
0.01
Round 0.9964 to 2 significant figures.
1.00
Round 0.064819 to 3 significant figures.
0.0648
Estimate the value of 0.99 + 7.78 - 4.35
5
Estimate the value of (801 × 9.74)/(65.53 + 91.54
50