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Slide 2

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--=+
X 0.1 = divide 10
-+=-
X 0.01 = divide 100
+-=-
X 0.001 = divide 1000
Divide 0.1 = x10 ++=+
Divide 0.01 = x 100
Divide 0.001 x 1000…read more

Slide 3

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X² - 4X = 90
x x² 4x x² - 4x Comment
11 121 44 77 Too small
12 144 48 96 Too big
Nearly
11.7 136.89 46.8 90.09 (BIG)
11.6 134.56 46.4 88.16 Small
-7 49 -28 77 Small
-8 64 -32 96 Big
-7.5 56.25 -30 86.25 Small
-7.6 57.76 -30.4 88.16 Small
-7.7 59.29 -30.8 90.09 NEARLY…read more

Slide 4

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1.29 x 4.5
1 . 2 9
0 0 3
4
4 8 6
.
0 1 4
5
5 5
0
9 x 4 = 36…read more

Slide 5

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0.0056
0.006
0.0427
0.04
0.00416
0.004 2661
3000
1823564
2000000…read more

Slide 6

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0.00482
0.0048
0.000703
0.00070
2911
2900
1624564
1600000
Same for 3 s.f.…read more

Slide 7

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Slide 8

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Slide 9

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Slide 10

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