Rounding And Estimating Worksheet Page 18
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18MEP Y8 Practice Book A
4.7
8.
For each set of instructions given below, write down the calculation that it
was used to find:
6
8
7
+ 2
÷
=
(a)
(
)
×
4
+
7
9
+
4
=
(b)
(
)
4
8
5
+
6
÷
=
(c)
(
)
×
1
+
7
8
3
(d)
(
)
÷
2
+
9
=
(
)
9.
Without using the fraction key, use your calculator to work out the following,
giving your answers, where necessary, correct to 3 significant figures:
1
1
1
1
1
+
+
+
+
+
(a)
1
6
5
4
3
2
1
(b)
1
1
1
1
+
+
+
6
5
4
3
1
(c)
1
+
1
1
+
6
5
80
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