Kids · Math puzzles · Volume 2
Math Flow: Machine Challenge
225+ Function Machine Puzzles for Kids Ages 9-12 | Four Operations and Reverse Flows, Grades 4-6
- Book language
- English
- Format (inches)
- 8.5 × 11″
- Children’s age
- Ages 9–12
- Grade range
- 4 - 6
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Book details
Math Flow: Machine Challenge, by Elyas Oulma. Printed puzzle book in English. Read the edition details and check availability on Amazon.
The machines grow up: multiply, divide, and run the flow in reverse. Four-operation machines with splits and merges; Reverse the Flow puzzles where the missing circles sit BEFORE the printed ones — run each pipe backward to find them. And in Machine Masters, the signature move: the merge made 12, one pipe brought 5 — so the other brought 7. That little subtraction unlocks whole machines, and it is real pre-algebra thinking in disguise. • 225+ machine puzzles across three skill-building sections • The backward move with × and ÷, taught step by step • The merge move with its own worked example • Every pipe uses a number from 1 to 9 — times-table friendly • Full solutions, 100% screen-free Book 2 of the Math Flow for Kids series.
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