JSS1: MATHEMATICS - 1ST TERM
Whole Numbers I | Week 13 Topics|1 Quiz
Whole Numbers II | Week 21 Topic|1 Quiz
Counting in Base Two | Week 34 Topics|1 Quiz
Arithmetic Operations | Week 43 Topics|1 Quiz
Lowest Common Multiple (LCM) | Week 52 Topics|1 Quiz
Highest Common Factor | Week 61 Topic|1 Quiz
Fraction | Week 77 Topics|1 Quiz
Basic Operations with Fractions I | Week 83 Topics|1 Quiz
Basic Operations with Fractions II | Week 91 Topic|1 Quiz
Directed Numbers | Week 103 Topics|1 Quiz
Estimation and Approximation I | Week 113 Topics|1 Quiz
Estimation and Approximation II | Week 126 Topics|1 Quiz
Rounding Decimals to the Nearest Tenth, Hundredth & Thousandth
Rounding Decimal Numbers to the Nearest Whole Number
Significant Figures (S.F.)
Numbers less than Zero
Approximation Involving the Four Basic Operation
- Rounding Decimals to the Nearest Tenth, Hundredth & Thousandth
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Estimation may be defined as a rough or sensible guess of a value or calculation.
It is useful to be able to estimate the following:
2. Weight (masses)
3. And capacities of any given object.
a. The length of a pencil is ≈ 16cm
b. The height of a man is ≈ 1.8m
c. A bag of salt is ≈ 1kg
Note the symbol ≈ means is ‘approximately equal to’
How to choose appropriate metric units of measurement.
The common metric units and their units:
1. Length \( \scriptsize \rightarrow\) km, m, cm, mm
2. Mass \( \scriptsize \rightarrow\) tonne, kg, g
3. Capacity\( \scriptsize \rightarrow\) l, cl, ml
4. Time \( \scriptsize \rightarrow\) hour, min, seconds
State the appropriate metric unit you would use to measure the following:
1. Length of your room.
2. Length of your fingernail.
3. Your weight.
4. The weight of a diary.
5. The amount of water in a glass cup.
6. The amount of medicine in a teaspoon.
7. The time it takes a sportsman to run 100m.
8. The time it takes to fill an empty tank.