Mental Math Bingo Within 20

2nd Grade MathAddition and Subtraction4 pages

About this worksheet

A whole-class bingo game for the 2nd grade fluency standard, Common Core 2.OA.2. Each student picks 16 numbers from a 1 to 20 bank and writes them on a blank M-A-T-H board, so no two boards match. The teacher reads 16 clues, from 7 + 7 to 11 - 2, and players solve mentally, write the answer, then cross it off if it sits on their board. A strategies box on the page names doubles, make 10 and think addition, and the answer key tags every clue with the strategy that fits, such as 8 + 5 solved as 8 + 2 + 3.

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$Mental Math Bingo Within 20: Addition and Subtraction - page 1$

$Mental Math Bingo Within 20: Addition and Subtraction - page 2$

$Mental Math Bingo Within 20: Addition and Subtraction - page 3$

$Mental Math Bingo Within 20: Addition and Subtraction - page 4$

Curriculum objectives covered

2.OA.2

“Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.”

All 16 clues sit within 20, and the strategy box plus the answer key attach a named mental strategy to each one.

What's inside this worksheet

How to Play callout

Setup rules printed on the sheet: choose 16 different numbers, write one per box, and mark four in a row across, down or diagonally to win.

Number Bank and M-A-T-H board

All twenty numbers from 1 to 20 to choose from, above a blank 4 by 4 grid headed M, A, T, H.

Mental Math Strategies box

Three worked reminders: doubles (7 + 7 = 14), make 10 (8 + 5 as 8 + 2 + 3) and think addition (15 - 8 as 8 + ? = 15).

Bingo Clues

Sixteen mixed clues to call, from 10 + 10 down to 12 - 7, each with a line for the answer before the board gets marked.

Answer key

Every answer arrives with its strategy named, so you can model how to solve a clue when the room stalls.

How teachers use it

Friday fluency game

Boards are student-built from the number bank, so the same sheet replays all term without new printing.

Strategy talk

After each clue, ask one student which strategy they used. The key gives the expected answer, like near doubles for 5 + 6.

Catch the gap

Four bank numbers (1, 2, 3 and 17) are never an answer. Students who chose them learn to scan the clue list before picking next round.

More 2nd Grade Math worksheets

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