KineticMath Lab • Tactile Math Sheet

Singapore Concrete-Pictorial-Abstract (CPA) Method • Grade 3

Name:

Date:

There is no timer. Read the story. Write the missing number in the box.

Problem #1

A solar battery holds 500 units of clean energy. A science rover uses 237 units on an expedition. How many units remain?

500 − 237 = [ ]

Problem #2

A digital reading app tracks 1000 reading stars for the entire school. Classroom 3B earned 468 stars. How many stars did all the other classrooms earn?

1000 − 468 = [ ]

Problem #3

An ocean submarine dives to 602 meters depth. It rises 298 meters toward the sunlight. What is its current depth?

602 − 298 = [ ]

Problem #4

A telescope factory has an order for 840 optical lenses. The automated polishing machine has completed 375 lenses. How many lenses are left to polish?

840 − 375 = [ ]

Problem #5

A community bird sanctuary counted 705 migratory birds in autumn. By early spring, 439 birds set off on their flight north. How many birds are still nesting in the sanctuary?

705 − 439 = [ ]

Problem #6

A high-elevation weather station has 900 hours of battery life. After a winter storm, 345 hours were consumed. How many hours of battery life remain?

900 − 345 = [ ]