Mathematics Class 7
Arithmetic Expressions
Find the value of a line, take brackets away, compare lines, and write your own.
16 lessons · ~97 min total
Track progress — 0 of 16 lessons read 0%
Lessons in this topic
- 0 Start here A roadmap: value, terms, brackets, comparing, and writing your own sum. · 4 min You are here
- 1 An expression and its value An expression is a sum written out. Its value is the number it comes to. · 5 min
- 2 The order changes the answer Work out 40 + 6 × 5 two ways. You get two numbers. · 5 min
- 3 Work out each term first Cut a line into terms. Work out each term. Then add. · 6 min
- 4 Brackets go first A bracket marks a piece to finish first. · 6 min
- 5 When two signs tie, take the left one Same-level signs? Do the left one first. · 6 min
- 6 What you may turn round Plus and times may swap. Minus and share change when turned round. · 6 min
- 7 One tray, counted two ways Split a tray, and the two counts still match. · 6 min
- 8 Writing your own expression Turn a real bill into one line, and check it. · 7 min
- 9 Swap and regroup the terms Terms can swap and regroup. The total stays the same. · 6 min
- 10 Taking the brackets away A minus before a bracket flips the signs inside. · 7 min
- 11 Compare without working it out See how each term moved. Then compare two lines. · 7 min
- 12 Split a number near 100 Write a number near 100 as 100 plus or minus a gap. · 7 min
- 13 Checkpoint Four quick checks on the newest ideas. · 4 min
- 14 The big picture Twelve ideas, tied back together. · 6 min
- 15 Track quiz Cheat-sheet table plus a reveal quiz — one question per idea. · 9 min
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