Sharing Garden — Lesson 98: Sharing practice: two-digit numbers
Sharing a three-digit number →Lesson 98: Abacus two-digit division practice
Level 8, Sharing Garden. Two-digit sharing on the beads. Fill the bead jar.
What your child does, card by card
Sharing practice: two-digit numbers. Practice day! PlayBuddy opens the lesson: “Practice time. Let's get quicker and better.”
First a reminder (“78 ÷ 6”): the beads build 78, 18 and 8, ring by ring, while your child watches. 6 × 10 leaves 18. Then 6 × 3. Each gets 13.
Try it: your child works out 46 ÷ 2, with a green ring on the next bead to move.
Ten beads to go: a mission of 12 tasks with a bead jar that fills with every right answer. Your child must work out 68 ÷ 4, 90 ÷ 6 and 87 ÷ 3.
In your head: the abacus is covered and your child works out 60 ÷ 3, 44 ÷ 4 and 39 ÷ 3, picking each answer from 11, 13 and 20.
Jar full! Two-digit sharing, a jar full.
What this lesson trains
19 answers in about five minutes. The tasks take 26 bead moves in all: 9 with a top bead and 17 with bottom beads. Clearing comes up 4 times. The largest is 90: tens and ones. Then 3 quick looks in your head. 1 of the 12 sums need a small friend (“−4 = −5 +1”); the others use free beads.
The first thing your child does: work out 46 ÷ 2.
The sum sheet
In Column Tower the lower window is a sum sheet instead of the hands: the column written out one line under another, the line being worked in yellow, the lines done ticked, and the total once the last line is in. The beads keep the running total, so the abacus is never cleared in the middle of a column.
What PlayBuddy and PlayType say
PlayBuddy: “Share the tens first, then the ones.”
Stars
With 1 or fewer slips across the 19 answers your child earns three stars; 4 or fewer, two.